A vacuum system and method for inspecting a workpiece that can include use the vacuum system, where the vacuum system can include a housing defining at least a portion of a vacuum chamber, a piston within the housing that oscillates to vary a volume of the vacuum chamber, a first valve and a second valve in fluid communication with the vacuum chamber, and a hood in fluid communication with the second valve and the vacuum chamber. The vacuum system can include high-speed valves that enable vacuum system cycling and thus vacuum pressure cycling at a rapid frequency.

Aspects described herein generally relate to apparatus and methods for determining operational performance of material systems. Apparatus generally comprise a salt fog chamber having a fixture support having material system flexing components to test corrosion of an aircraft material system. In one aspect, a material performance chamber comprises a salt fog chamber and a jaw configured to flex a material system. Methods for determining corrosion include exposing a material system, such as a panel, to salt fog and flexing the material system at a frequency. In one aspect, a method for determining corrosion includes exposing a material system to a salt fog. The pH of the salt fog is from about 3.0 to about 9.0 and flexing the material system at a frequency from about 0.1 Hz to about 60 Hz.

Aspects described herein generally relate to apparatus and methods for determining operational performance of material systems. Apparatus generally comprise a salt fog chamber having a fixture support having material system flexing components to test corrosion of an aircraft material system. In one aspect, a material performance chamber comprises a salt fog chamber and a jaw configured to flex a material system. Methods for determining corrosion include exposing a material system, such as a panel, to salt fog and flexing the material system at a frequency. In one aspect, a method for determining corrosion includes exposing a material system to a salt fog. The pH of the salt fog is from about 3.0 to about 9.0 and flexing the material system at a frequency from about 0.1 Hz to about 60 Hz.

A dilatation or fatigue tester for a stent-graft prosthesis includes a sample holder having a compressible member that defines a chamber for receiving a stent-graft prosthesis in an expanded state, a bearing assembly disposed to contact and act on an exterior surface of the compressible member of the sample holder, and an actuation assembly operably coupled to the bearing assembly for rotating the bearing assembly relative to the sample holder. Rotation of the bearing assembly cyclically compresses the compressible member of the sample holder to thereby provide cyclical radial loading and unloading of a stent-graft prosthesis received therein for simulating physiologic loading conditions of a stent-graft prosthesis within a vasculature due to a beating heart.

Provided herein are methods and systems for rapid testing of films used in the manufacture of bioprocess bags. The methods described herein allow for determination of resistance to flexural fatigue while mimicking actual conditions in bioprocesses such as flexion and subsequent fatigue and failure of a bioprocess bag made of a film when it is placed on a rocking platform.

Aspects described herein generally relate to apparatus and methods for determining operational performance of material systems. Apparatus generally comprise a salt fog chamber having a fixture support having material system flexing components to test corrosion of an aircraft material system. In one aspect, a material performance chamber comprises a salt fog chamber and a jaw configured to flex a material system. Methods for determining corrosion include exposing a material system, such as a panel, to salt fog and flexing the material system at a frequency. In one aspect, a method for determining corrosion includes exposing a material system to a salt fog. The pH of the salt fog is from about 3.0 to about 9.0 and flexing the material system at a frequency from about 0.1 Hz to about 60 Hz.

A flexible circuit board test device is disclosed. The flexible circuit board test device includes a main clamp, a first rotating shaft arm and a second rotating shaft arm; the first rotating shaft arm and the second rotating shaft arm are rotatably mounted on a first mobile table and a second mobile table through a first main shaft and a second main shaft respectively; the first rotating shaft arm and the second rotating shaft arm each are provided with a sandwich space for simulating a motion space of a flexible circuit board; the first mobile table is provided with a first driving component in transmission connection with the first main shaft, the second mobile table is provided with a second driving component in transmission connection with the second main shaft; and the first rotating shaft arm and the second rotating shaft arm are provided with auxiliary clamps.

To provide an analysis apparatus, an analysis method, and a program that are non-destructively analyze a degree of damage of a fiber rope, an analysis apparatus includes an analysis unit that analyzes the degree of damage of the fiber rope by using an invariant model indicating a relationship between a plurality of pieces of time-series data based on measurement data of one or more sensors attached to or around the fiber rope.

An in-situ fretting corrosion fatigue testing machine based on synchrotron radiation diffraction and three-dimensional (3D) imaging includes an axial fatigue loading system, a fretting loading system, and a corrosion environment control system, where the axial fatigue loading system includes a driving device, a load control device, and a load sensing device; the load sensing device is configured to measure an axial force and a normal force in real time; the driving device is configured to drive the load control device, thereby achieving axial displacement of the load control device; the load control device is configured to carry out axial fatigue loading of a specimen; and the fretting loading system includes a fretting wear device. The testing machine achieves real-time 3D imaging characterization of wear spot and crack morphology of a material in a fretting corrosion environment, as well as characterization of a residual stress evolution law.

Disclosed are a method and device for testing the adhesion of an adhesive, planar body on a planar substrate, wherein the planar body is applied adhesively on the substrate, the substrate is moistened, and a mechanical force is exerted on the substrate by means of an element in the form of a dumbbell-shaped magnetic stirring rod acting on the side of the substrate facing away from the adhesively applied body, wherein the substrate is repeatedly reversibly deformed at least in parts of the adhesive region of the planar body by means of the exertion of force, and, after a period of time, exertion of the mechanical force is ended, and the remaining adhesion of the planar body is assessed in qualitative and/or quantitative terms.